Rod-grinding machine



J. A; HUN T ROD GRINDING MACHINE March 11-, 1924.

1920 3 Sheets-Sheet 1 Fi led Aug 17 .lnveniov. Jonathan #7. Hunt, b au a? g .WM.

9 flags.

March 11, 1924.

J. A. HUNT Ron GRINDING momma a anflJiwart, 4 ity E; u & Inveniov b Jami? IiHl March 11. 1924.

- 1,486,435 J. A. HUNT ROD GRINDING MACHINE Filed Aug. 17 1920 13' Sheets-Sheet 5 Inveniqv: Jonathan 1/7. Hunt,

Patented ltllar. ll, i924.

JONATHAN A. HUNT, OF SALEIE, MASSAGHUSETTS.

ROD-GRINDING IL ACHINE.

Application filed August 17, 1920.

To all whom it ma concern:

Be it known that JONATHAN A. HUNT,

citizen of the United States, and a resident of Salem, in the county of Essex and State of Massachusetts have invented an Improvement in Rod-iirrinding Machines, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to machines for pointing wires or rods but more particularly wires used in making talking machine needles. An object of the invention is to provide a rapid machine that may readily be adjusted to compensate for wear particularly of the grinder or work-forming memher or to receive work of various sizes and lengths.

The invention consists in the combination and arrangement of parts set forth in the following specification and particu-' larly pointed out in the claims.

In the accompanying drawings wherein is shown merely for the purpose of illustration one embodiment of the invention:

Fig. 1 is a front elevation of the machine;

Fig.- 2 is left-hand side elevation of the same;

Fig. 3 is a vertical section, partly in elevation, taken on the line 3-3 of Fig. 2;

Fig. a shows a detail plan view of the main frame, grinding wheel and housing for said grinding wheel viewed from the line -l4- of Fig. 1;

Fig. 5 is a skeletonized plan of the raising and lowering means for the grinding wheel housing viewed from the line 5-5 of Fig. 1; and

Fig. 6 is a detail vertical section taken on the line 66 of Fig. 4: illustrating the adjusting means for the left or lower end of the work table.

Fig. 7 is a detail view of a portion of one of the feed wheels 33 and its saddle.

in the drawings frame is shown for s pporting the various instrumentalities of the machine. This frame preferably is of box-like formation including front and back members 1 and 2 and side members 3 suitably secured together. Mounted within said frame is a casing or housing 4 adapted to contain the work-forming member herein an abrasive grinding wheel 5, the latter bein secured to an arbor 6 journalled in bear- Serlal No. 404,110.

ing blocks 7, 7 at opposite sides of the grinder housing 4.

The grinding wheel 5 is provided with a concave grinding surface 8 of well known form.

it is desirable that the grinding wheel be adjustable in order to compensate for the wearing down thereof and this adjustment is preferably such as to effect the movement of the axis of the wheel laterally and to maintain said axis substantially parallel with the positions previously occupied thereby. To effect this result the housing 4 within which the wheel is journalled to rotate is adapted to be moved bodily in a vertical direction within the frame 3, preferably by means including screws 9, herein two, pivotally connected at their upper ends as at 10 between lugs 11 formed upon said housing.

The screws 9 are guided in lugs 12 formed upon the side members 3 of the frame and vertical movement is imparted to each of said screws herein by nuts 13 constructed as bevel pinions and to rotate upon the lugs 12. Each of the nuts or pinions 13 is arranged to mesh with a bevelled gear 14: (see Figs. 3 and 5) attached to a. countershaft and journalled to rotate in suitable hearings or lugs 16 projecting from the side frames 3. Secured to the opposite end of each of the counter-shafts 15 is a second bevelled gear 17 in turn meshing with the driving gear 18 attached to a common operating shaft 19, the latter arranged in bearings 20 also on the side frames 3. An operating wheel 21 is attached to said shaft 19 whereby a rotary motion ma be imparted thereto by the operator. ll the means described it will be evident that both sides of the housing and incidentally both ends of the arbor 6 for the grinding wheel will be given simultaneous and uniform movements either up or down as the case may be. It is desirable that the casing be securely held in its adjusted positions for which purpose binding screws 22- are arranged to extend through slots 23 in the side frames 3 and into screw-threaded engagement with opposite portions of the housing, which portions have surfaces 24 to engage corresponding surfaces upon the inside of the frames 3.

When adjustment of the housing is desired the binding screws 22 are relieved and the shaft 19 is rotated by the operating wheel 21 to simultaneously rotate the nuts 13 through the intervening trains of gears, thus simultaneously raising or lowering the screws 9 through the lugs 12. After the desired adjustments have been made the binding screws 22 are tightened, thus securing together the adjacent portions of the housing and the frame 3.

Lateral play of the housing 4 in a direction axially of the arbor during the raising and lowering of the housing is prevented herein by guide screws 25 mounted in the frames 1 and 2 so as to extend into engagement with the faces of the ribs 26 formed upon said housing. The screws 25 may, however, if desired, be adjusted to tip said housing thus throwing the axis of the grinder arbor out of parallel with its former position and this in order to vary the concave face of the grinder to make it conform with the grinding surface of the saddles hereinafter described, this adjustment being of particular advantage to overcome unifornrwearing of the grinding surface of the grinder. To rotate the grinder 5 a pulley 27 is attached to one end of the arbor 6 and receives its power from any appropriate source.

The housing 4 for the grinder is preferably arranged to extend around the greater portion of the periphery of said grinder to catch grinding dust that otherwise would be thrown off thereby leaving only a relatively small peripheral opening as at 28 for the admission of the work to the face of the grinder and to prevent the discharge of dust through this opening a suitable guard is placed adjacent to the upwardly moving side of the grinder, said guard consisting of a plate 29 (see Fig. 8) the edge whereof is arranged to substantially fit the concave face of the grinder and this plate is adj ustably mounted upon the housing 4 to compensate for. the wearing down of the grinder.

To the lower portion of the housing 4 a pipe 30 is attached which pipe preferably communicates with a suitable blower device of a well known form therefore not shown, for removing the grinding dust from the housing. This pipe is preferably provided with a telescopic connection 31 to allow for vertical adjustment of the housing within the frame.

In machines of the character described the work is fed transversely of the face of the grinding wheel or work-forming member and preferably in substantially tangential relation thereto but at an angle to the axis of the grinder, the grinding operation being initiated upon the end of the work at a point on the circumference of the grinder in advance of the point of contact of the tangent with its circle, the end of the work being moved during the feeding operation at an angle to but toward a radial plane passing through said point of contact. As the work, herein rods, is advanced transversely of the grinding surface of the grinding wheel its end will gradually as suine the form of a point by reason of its gradual approach to said plane.

It is obviously within the scope and purpose of the invention to form either a chisel. or a round point upon the ends of the rods but in the present example means for effect ing the rounding of the points are provided, said means preferably including a plurality saddles 32 and cooperating feed wheels 33. The saddles have concave and herein resilient guiding surfaces 34 which coincides with the face of the grinding wheel The cooperating faces of the feed wheel are likeise provided with resilient covering 35 and these conform with the faces 34 of the saddles. It is desirable at times to vary the angle of approach of the rods or work with respect to the grinding surface of the member 5 so that the taper or angle of the finished point may be long or short and in the present example this adjustment is provided for by mounting the saddles 32 and their cooperating feed wheels upon a suit: able work table 36 to which lateral, longitudinal or transverse movement may be imparted to vary its relation to the work memher as will hereinafter be described. The table 36 has an opening 3? through which the housing and grinding wheel are adapted to protrude in order that the work carried by said plate or saddles thereon may be brought into contact with the grinding face of said wheel.

The work table 36 is disposed at an angle to a vertical plane passing through the axis of the grinding wheel and this table is preferably pivotally mounted so that such angle may be varied from time to time. The sad dies 32 are mounted upon the table 36 within the opening 37 and in such a manner that they may be adjusted longitudinally ofsaid opening or said table, or said saddles may be rocked slightly to cause the guiding surfaces thereof to more perfectly or coincide with the guiding or coacting surfaces of the feed wheels 33. To effect the adjustment of the saddles longitudinally of the table one side of each saddle is arranged to engage a key 38 (see Fig. 7) which. key is arranged to slide with said saddle and in a groove 39 extending longitudinally of the table 36 and parallel with. the opening 37. The key 38 may be attached in any appropriate manner to said saddle but as shown it extends into a groove 40 formed in said saddle. An adjusting screw 4-1 is secured at each side of the saddle in lugs 42 projecting laterally from opposite faces thereof (see also Fig. 3), said screws 41 being adjacent to the key 38. The screws 41 engage the uper surface of the table 36 and are held in contact therewith by screws &3 extending through the lugs 42 and into screw-threaded engagement with said table 86. Hence it wi be seen that by adjusting ii the positions of screws 31 in said lugs,

a slight vertical adjustment be provided for the end of the saddles at which said la s are located and this adjustment may be lined by the screws 43. 7 site ends of the saddles are also a usta'ry arranged with respect to the upper surfer-e of the table 36 and herein by means justing screws at having SCKQW-tlllfQEadEQ engagement with iateral lugs said saddles and rest against the of the table 36. itact of said sci said table is maintained screws extend throi i said lugs a5 and into screwthreaded engagement with the table. By means of the at nsting devices jns described the guiding surface of eacn saddle may adjusted so as to secure the most efiectual cooperation with the grinding surface of tie grinding Wheel.

it is desirable to provide for the adjus ment of the saddles 32 longitudinally of th table 36, the saddle nearest to the grinding wheel being adjustable to compensate c the reduction in diameter of said wheel due wearing down thereof, while the other saddle is made adjustable to accoincdate rods of varying lengths. There are occasions when the adjiistment particularly ot the saddle nearest to the grinding wheel, should be very fine and gradual; therefore appro priate means for effecting suchan adjustment are provided, and the example shown includes an adjusting screw &6 (see l 6) arranged in screw-threaded engage: ent with a bracket a: and with its inner end onspaced de- 2) that are 1, the latter bracket adjustably secured to the pi to es and to the table 36 p rniitting said table and plate to be moved by the screw 4&6 longitudinally tsaid table and to be s cured its adjusted relation to the bracket T cars 49 elongated and the sl open at their lower ends to provide for vcrto which said bracket is secured as for exv:nple when it is desired to suddenly remove no work from contact with the grinding suitece of the wheel.

.1 he shaft 51 is provided adjacent the beartical movement of the end of the table ing 52 with earns or eccentrics 54 arranged to engage the plate 48 and an operating lever 55 is attached to one end of saic shaft waereby said may be is desired to raise the end of said w and remove the ends of the ds cains or eccentrics constituting the p o the lower of said worlr latter is angtilarly adjusted by hereinafter to be described for ad u er end tireef.

l nioveinet the with the screw as and t6 be i key 38 slid along serted the worn is re 11' nioven 1 c the groove 39, s other holes proi table.

The ril e as able vertically l rods 56 ier side screw-- pivotally attached at 5'? to ir +n 1; i (4% 5 110?" Oi SaMur out) (,7 said JLVJe COL), axis about which he table is ocked i v F i: i, eccentrics 5a, the Onfii ends or said screws we .11- engaging plates ob i i i in ii y are her in r 1' ,i ,I? r x. v i V Lil'eli aCljllBl/du positions, by cnech nuts 59 (see Figs. 3 and i}. The plate 58 are adustably secured by screws 60 to brackets Si mounted at opposite corners of the frame of the machine; said brackets being provided holes 62 to receive said desired to vary the pen with plurality of screws 60 when it is tions of the screw-threaded rods plates 58 are also slotted at 63 to receive the screws 60 and to permit a illt id adjustment of the plates without necessitating the movement of the screws 60 0 o her holes 62.

From

The

.5 the foregoing description it will be seen that a universal adjustment of the table 36 is possible;

In machines of the type shown considerable dicticnlty has been i iced in feeding rods to the wheel oy reason oi": the fact that rods of considerable length beccrne twisted about each other but in the present machine this has been overcome by pro iding inrality of sets of feed members, e ch inciod g a saddle and feed -l and arranger "for independent ad- 3 nent longitudinally ot the work table, as previousl oescribed. so that they may the rods at such points as to prevent any twisting or of The teed eels as well as the dles independently adjus able, seie mace-is g mounted upon a 6 ournalled to rotate in boxes 65 vertically ijustable in Jed standards or brackets the letter surface of the to said t longisecured b0 me upper i ble 3 wheels 38 are keyed -att but are capable or moi 8111613 indinally of said shaft and are adapted to be secured thereto in their ad usted pos1- lid table as viewed in i said :ten necessary to adjust the feed toward arty from t is snidces oi the a the two or rduralil given 9 :tnltancous and equal so that the same amount of pressure will always he brought to bear upon the rods where they engage the saddle nearest the grinding wheel well as with the other set, thus in.- suring an equal feeding movement at opposite ends of the rod. For this purpose mean are provided for rais 1g and lowering; both ends of the shaft (i l at the same time and an equal mount, means comprising screws 73, one being rotatable in each of the standards 66 and having screw-threaded engagement with the boxe 65. To the upper end of the screws 73 are attached bevelled gears M which mesh with bevelled gears 75 secured to a common driving shaft 76 journalled to rotate in bearings i said standarcs. A hand wheel 77 is attached to said shaft '76 and serve as means for manually operating the shaft to raise and low r said boxes.

While I have herein shown and described merely for illustrative purposes, a specific embodin'ient of my invention and have disclosed and discussed in detail the construction and arrangement incidental to such disclosures, it is distinctly to be understood that the invention is limited neither to the more details or relative arrangement oi? parts nor to the specific application herein shown but that extensive variations from the illustrations be made withcuit degnrrting from the principles thereoi".

Claims.

1. In combination, a work member, a houssubstantially enclosing saio work inciner, bearings in said hens g within which aid worleniember is iournailed to rotate and ,i'ieans to raise and lower saic. gother with solo work member.

2. ln combination, a work table, a work member, a housing within which said grind ournalled to rotate, means to o lower said ousing together with member relatively to said work table, and during said raising and lowering movements to maintain the axis of said work member in predetermined relation to said table, and means independent of said lowering means to tilt said 'ng and said axis.

1 achine oi the character described comprising, in combination, a work member and a housii 'Wlllltlll which said work member is jonrnallcd to rotate and arranged for bodily n'iovenient therewith, said housing havi g a peripheral opening above the axis of: said work member for permitting worir to be placed against the periphery of said work n'iember.

A machine of the character described comprising, in combination, a frame, a work support mounted upon said frame, a grindwheel to operate in conjunction with work support, means to enclose said ding wheel and provided with bearings i, ithin which said wheel is journallcd to rotate, and means simultaneously to raise and lower said bearings with said housing and grinding wheel relatively to said work support.

5. machine of the character described comp sing, in combination, a rotatable work-forming member, means to feed the work transversely of the working :taoe 0i said workforming member, and means to raise and lower said worlrforming member bodily with respect to the workdeeding means and to maintain the axis of said work forming member in parallel relation with predetermined former positions thereof.

6. ln a machine of the character described, the combination of a frame comprising side members, a housing arranged for vertical sliding movement between said side members, a work member journalled to rotate in said housing, adjustable guiding means for said housing, and means to raise and lower said housing together with said work member relatively to said side members,

7. A machine of the character described, comprising, in combination a frame, a housing arranged within said frame for bodily movement, a grinder rotatably arranged within said housing, means bodily to move said housing together with said grinder relatively to said frame, and to maintain the axis of said grinder parallel with its previous positions, and means to secure said housing to said frame in its adjusted position.

8. A rod pointing machine comprising, in combination, a Work wheel, a housing Within which said work wheel is journalled to rotate, means to move the axis of said work wheel to positions parallel with its previous position to compensate for Wear of said charge of dust from said rousing, havin. an edge conforming to the w face or said work wheel adapted to he moved to compensate wheel.

9. A rod pointing machine comprising, 1

wheel, a housinr combination, a grinding within which aid g mg: wheel is ranged to rot said housing having an opening in its "oper portion to 'oerini tl LLT itl in which sam tate, means to feed the work to said grinder, and means bodily to raise and lower said 1' with rel housing together with said grince speet to the work, said raising am lowering means including screws attached to opposite sides of said housing, nuts to rotate in screw-threaded en agement with said rods to effect axial movement of said rods, and common rotating means for said nuts.

11. A grinding machine comprising, in combination, a rotary grinda" a housing within which said grinder is arranged to rotate, means to feed the work transversely of the face of said grinder, means boldly to raise and lower said housing together with said grinder with respect to said work-feed ing means, said raising and lowering means including screws pivotally attached separated points to said housing, toothed nuts to rotate screw-threaded engagement with said screws, and common rotating means for said nuts to effect the uniform raising and lowering or" said rods.

12. A grinding machine comprising, in combination, a rotary grinder, a shaft to which said grinder is secured, a housing to enclose said grinder, said housing having bearings at opposite sides thereof within which said shaft is ournalled to rotate,

means to effect simultaneous adjustment of said hearings with said housing, and means to secure said housing in its adjusted position.

13. A grinding machine comprising, in combination, a rotary grinder, a casing having bearings at opposite sides to support said grinder, means bodily to move said grinder and said casing and means connected with said housing to remove dust therefrom.

14. A grinding machine comprising, in

ent the disa d means iaohine comprising, 7 memher having "nice and a i tv or me Q work transversely of; V

rod pointin comprisi g, L; H ion. plura ty of sets of feed is here i diustaole o: a i

worn transversely l the race of said grinding member, and simultaneously to adjust the members or" said sets toward and from each other.

20. in combination, a grinding wheel, a table mounted to said wheel, means to vary the anale of said table relatively to said wheel, plurality of saddles carried by said table and independently adjustable th reon rela ively to said wheel, and feed wheels resnectivel v to cooperate with said saddles to roll rods transversely of the grinding "face of said grinding wheel.

21. In combination, grinding Wheel, a table mounted adjacent to said wheel, means to vary the angle of said table'relatively to said wheel, a plurality of saddles carried by said table and independently adjustable thereon relatively to said wheel, a shaft journalled to rotate in bearings on table, a plurality of feed wheels adjustably secured to said shaft to cooperate respectively with said saddles to feed rods to said rality of saddles arranged upon said table,

said saddles having concave resiliently covered guiding surfaces, feed wheels respectively to cooperate with said saddles to feed rods transversely of the face of said grinding wheel, and means for moving said table bodily whereby the angle of the rod to said wheel may be varied.

23. A red grinding machine comprising, in combination, a grinder, a table arranged for transverse adjustment and for independent vertical adjustment of the opposite ends thereof relatively to said grinder, and means carried by said table to feed the work to said grinder.

24. A rod grinding machine comprising, in combination, a grinder, a work-supporting table pivotally arranged relatively to said grinder, means for swinging said table about its pivotal axis to remove the work from contact with said grinder, and means vertically to adjust said axis.

25. In combination, a grinder, a work supporting table pivotally supported at opposite ends to permit angular adjustment relatively to said grinder, and means vertically to adjust the pivots for said table.

26. In combination, a grinder, a pivotal table, work-feeding means carried by said table including a pair of saddles independently adjustable on said table and feed wheels to cooperate with said saddles to roll insane-s the work along the surface thereof, transversely of the face of said grinder.

27. In combination, a grinder, a work table, work-feeding means carried by said table including a plurality of independently adjustable saddles, feed wheels having independent axial adjustment adapted to cooperate respectively with said saddles to roll the work along the surface thereof transversely of the face of said grinder, and means for uniformly a justing said feed wl eels relatively to said saddles.

28 In combination, a work member, a plurality of independently adjustable work guiding members and rotary feed members to cooperate respectively with said work guiding members to guide the work to said work member;

29. In combination, a work member, a plurality of independently adjustable resilient faced concave work guiding members and rotary feed members to cooperate re spectively with said work guiding members to guide the work to said work member.

80. in combination, a work member and means to feed work to said member including a plurality of separated work guiding members and rotary feed members to cooperate respectively with said work guiding members, the worlr-engaging faces of said feed members being substantially the same width as the work-engaging faces of said work guiding members.

31. In combination, a work member and means to feed work to said member including a plurality of separated work guiding members and rotary feed members to cooperate respcctively with said work guiding members, said work guiding and work feed ing members having resilient work-engaging faces. I

In testimony whereof, l have signed my name to this specification.

JONATHAN A. HUNT. 

